Larry Lee Brauer, owner of Lone Wolf Outdoor Supplies in Calamus, made a brief appearance Wednesday in federal court in Davenport following his arrest. He is in federal custody until a detention hearing Friday.

A criminal complaint signed by the Bureau of Alcohol, Tobacco and Firearms charges Brauer with knowingly possessing a fully automatic machine gun that was not registered to him. The charge is the result of a sting operation in which a longtime customer worked with ATF to purchase the weapon from Brauer last month.